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Ashburn, Va. • Robert Griffin III says he cried after his knee surgery and changed his cellphone passcode to the date of the Washington Redskins season opener as he began his rehabilitation process.

Griffin held his first in-depth news conference Thursday since his reconstructive knee surgery in January. He also took part in an offseason practice session in which he wore a large black brace and ran drills with other teammates recovering from injuries.

Griffin says he's "hashed things out" with coach Mike Shanahan, who was widely criticized for leaving Griffin in the game after the quarterback was injured during the playoff loss to the Seattle Seahawks.

Griffin says the next steps in his rehab involve "explosive sprinting" and "cutting." He remains confident will be play in that season opener on Sept. 9.